Embroidery-machine.



R. ZAHN. EMBROIDERY MACHINE. APPLICATION FILED DEC. 17, 1909.

1,016,193. I Patented m 30,1912.

ROBERT ZAHN, OF PLAUEN, GERMANY.

EMBROIDERY-MACHINE.

Specification of Letters Patent.

Patented Jan. 30, 1912.

Application filed December 17, 1909. Serial No. 533,508.

movements of the mechanism are controlled by a jacquard device.

In the accompanying drawing, Figure 1 shows those parts of the machinewhich are important for the understanding of this invention in sideelevation, viewed from the left, and Fig. 2 is a perspective view of adetail of Fig. 1.

At the front side of the embroidery surface :22 are, as is well known,series of needles 1 securedto rails 2, of which two for two series ofneedles are shown, superposed in the present example, and which,together with the rods 3 form a rigid whole. The rods 3 arelongitudinally movable in bearings 4, and are capable of beinghorizontally reciprocated therein by means of mechanism not shown in thedrawing, for the purpose of forcing the needles 1 with their threadsthrough the embroidery surface 00, to produce the embroidery design. Thethread is drawn oil from the supply spool 8 and carried around the guideroller 7, to and over the,two guides 6 and 5 and from here to theneedle 1. At the moment in which the thread is to be drawn taut at theneedle 1, the roller 7 must be held stationary. To this end the roller 7is provided with a ratchet wheel 9, with the teeth, of which a pawl 10is caused to engage, 1n order to stop the roller at the instantrequired. Each pawl 10 is arranged on a lever 11, and all these leversare connected or pivoted to a common connecting rod 12. Secured to themain shaft 13 of the machine is a cam 14, the circumference of whichengages with a roller 15, which is rotatably journaled at the end of therod 12. Each revolution of the main shaft 13 causes the cam to raise theconnecting rod 12, .thereby releasing the roller 7 at the instantrequired for the take up of thread by the needle 1.

Some embroidery patterns are sometimes enriched by a thick cord securedthereto 1n the form of astraight horizontal relief line. To this endarms 16 are secured at both ends of the embroidery to a common shaft 17(Fig. 2) allotted to each needle series. Ar-

ranged at the end of eacharm is a hook 18. The two shafts 17 of theupper and lower needle series are movably connected by aconnecting bar19 in such manner that on moving the bar both hooks 18 aresimultaneously so moved toward the embroidery surface aas to preciselycoincide with the.

line of points at which the needles 1 enter the embroidery. Thus, if acord is carried by the hooks 18 and the arms 16 are swung forward by theconnecting bar into the position 16, shown in dotted lines, while themachine is running, the cord will be sewn or fixed by all the needles 1of each series to the embroidery surface as, which is the object of thecord inserting device 16, 17', 18, 19, just described. All workingmovements of the whole embroidery machine are controlled by a jacquarddevice and the main shaft 13 effects the drivin' of all parts.

In the drawing the jacquar 'jdevice is indicated by the square box 20,21, 22, 23 and only those parts are shown wb fich are essential for theunderstanding-of the invention.

Secured on the shaft 24 of the jacquard device is a toothed wheel 25having twice as many teeth as a toothed wheel 26 which is mounted on themain shaft 13 and with which it engages. Thus, while the shaft 2 1 makesone revolution, the main shaft 13 makes two revolutions. Secured to theshaft 24 is a cam having a cam groove 27, 28, 29, 30, within which isguided a roller 31 on the arm of a bell crank lever which is pivoted at32. The portion between the points 27, 28 and the portion between thepoints 29, 30 of the cam grooveare concentric with the shaft 24. Thus,as long-as the roller-31 travels along these circular parts of thegroove, the bell crank lever 31, 32, 33 remains stationary and only whenthe roller is guided in the descending portion 2928 and in the ascendingportion '2730, is the bell crank 1ever operatedj Movably attached to thefree end 3 1 of the cord carrying lever 17, 16, is a coupling rod 35,the other end of which carries a head 36. The upper and the lower facesof this'head 36 are each provided with a recess of which the lower oneis adapted toengage with the free end 33 of the cam operated lever,while the upper recess is capable of cooperating with one or the otherof two stationaryabutments 37 38. The coupling rod 35 is looselysupported within a head portion 39 of a rod 40 which from time to timeis reciprocated in the directions of the double arrow 41. Thedisplacement of the rod 40 in these directions is due to the jacquardmechanism according to the nature of the pattern to be embroidered.

The operation of the described mechanism is as follows;:-Assuming themain shaft 13 to be rotating'and all the mechanism partaking in theordinary embroidery process to be in regular working. The needles 1enter the cloth w and the connecting rod 12- releases the thread guiderollers 7 at the required intervals in which operation the lever 31 33is constantly rocked without, however, producing any effect. Supposingnow the moment to have arrived in which a cord is to be attached to theembroidery. At this instant the jacquard causes the rod 40 to move sothat the head 36 of the coupling rod is removed from engagement with thestationary abutment 37 and moved on to the lever end 33. Consequentlywhen the roller 31 of the lever comes into engagement with the camportion 2928, the rod 85 will be moved to the right and then the rod 40is again moved to a small extent, in the opposite direction, whereby thehead 36 comes into engagement with the abutment 38. By this operationthe levers 16 are brought into the position 16; and simultaneously theconnecting bar 19 is caused to strike with its abutment 42 against anabutment 43 on the connecting rod =whereby the two locking pawls 10 arelifted out of engagement with the teeth of tee c orresponding ratchetwheels 7. While all this is taking place, two attendants have seized along cord at both ends and inserted it in the hooks 18, and this cord isimmediately sewn on by all the needles 1. As soon as this sewing on. iseffected, for which only a few A working movements of the needles 1 arerequired the levers 16 are brought back to their initial position. Tothis, end the rod 40'is so moved by the jacquard deyice that the head 36of the coupling rod 85 is moved from the stationary abutment 38 on tothe lever end 33 and back again to the stationary abutment 37.

In automatic jacquard devices as hitherto used for embroidery machines,besides the rod 10, another automatic mover was necessary for thepurpose of pushing the thread releasing rod upward as soon as the cordinserting mechanism 16, 17, 18, 19 became operative. The object of thepresent invention is to bring about this necessary moving up of the rod12 without the aid of a second jacquard driving member or mover by themovement of the rod 40 itself with the ald of the two abutments 4:2, 43whereby the automatic embroidery machine is greatly simplified. Themanufacture of the ma chine is moreover accordingly cheapened andinterruptions or difliculties in the working of the mechanism occur lessfrequently roiaiee than hitherto where the usual devices were used. Alsothe production of the perforations in the card slip, the so-calledjacquard card, is simplified, because the special perforations for asecond jacquard mover are no longer necessary and consequently thenumber of errors in the embroidery .patterns, often caused by negligenceof the pattern maker, is thus considerably decreased.

I claim: 1. In an embroidering machine, sets of needles and means foroperating the'same,

means for braking the needle thread supply, means for applyingornamentalcords to the surface of the work, and means for operating thelatter means having devices attached thereto for acting upon the brakingmechanism.

2. In an embroidering machine, sets of needles and means for operatingthe same, means for braking the needle thread supply, means for applyingornamental cords to the surface of the work, .means for operating thelatter means having devices attached thereto for acting upon the brakingmechanism, and an automatic jacquard for controlling the means operatingthe cord applying means.

3. In an embroidering machine, sets of needles and means for operatingthe same, means for braking the needle thread supply, means for applyingornament-a1 cords to the surface of the work, a device for moving saidlatter means in and out of operative position, an automatic jacquard forcontrolling said device and means cooperating with said cord applyingmechanism for releasing the braking mechanism.

4:- In an embroidering machine, a rocking mechanism for applying cordsto the surface of the work, a reciprocatory rod attached to saidmechanism, an automatic jacquard device, and a connectingrodintermediate the jacquard and thereciprocating rod, and a camoperated lever for moving the said reciprocating rod at predeterminedtimes, said jacquard operating on said reciprocating rod to move thesame from its'normal connection with said cam operated lever.

5. In an embroidery machine, the combination with sets of needles andmeans for operating the same, of means for applying ornamental cords tothe surface of the work, means for braking the needle thread supply, anautomatic jacquard device, means controlled by the latter for operatingboth the cord applying means and the thread supply braking means andhaving devices attached thereto for acting upon the braking mechan1s-m.

6. In an embroidery machine, the combination of means for applyingornamental ply, an automatic jacquard device, means intermediate thelatter and the cord apply-- ing means for controlling the latter, andcooperating means between the-cord operating device and the threadcontrolling means for releasing the thread when the cord is applied tothe work.

7. In an embroidery machine a cord applying device comprising a rockingarm, a cord support thereon, a rod for rocking said arm and a projectionon said r.0d,a thread controlling mechanism comprising a toothed wheeland pawl, a rod to which said pawl is connected, and a lug on said rodadapted to engage with the-projection, and means for moving the rodoperating the rocking arm at predetermined times, substantially as setforth.

8. In an embroidery machine a cord applying device comprising a rockingarm, a cord support thereon, a rod for rocking said arm and a projectionon said rod, a thread controlling mechanism comprising a toothed wheeland pawl, a rod to which said pawl 'is connected, and a lug on said rodadapted to engage with the projection and an automatic jacquardcontrolled device for moving the rod operating the rocking'arm atpredetermined times substantially as set forth.

9. Inv an embroiderymachine comprising a cord applying mechanism, athread controlling device and an automatic jacquard device, a drivingshaft, a toothed wheel and a cam on said shaft, a rod connected tothethread controlling mechanism' operated by said cam, a second toothedwheel gearing with the said toothed wheel, a shaft carrying said secondtoothed wheel and forming the shaft of said jacquard device, a cammounted on said shaft and a pivoted lever operated by said cam andcooperating with the cord applying mechanism substantially as set forth.a

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT ZAHN.

Witnesses:

B. T. MURPHY, EUGENE LABIL.

